functions - Read For Learn

Add Useragent to the body class?

something like this maybe: function my_class_names($classes) { $useragent = $_SERVER[‘HTTP_USER_AGENT’]; if(strchr($useragent,’Safari’)) $classes[] = ‘Safari’; // etc.. return $classes; } add_filter(‘body_class’,’my_class_names’); Edit – as per Chip’s suggestion, here’s the function using the WordPress useragents checks: function my_class_names($classes) { global $is_lynx, $is_gecko, $is_IE, $is_opera, $is_NS4, $is_safari, $is_chrome, $is_iphone; if($is_lynx) $classes[] = ‘lynx’; elseif($is_gecko) $classes[] = ‘gecko’; elseif($is_winIE) … Read more

why doesnt is_home() work in functions.php

At the time functions.php is included during bootup, WordPress has no idea on the contents of the query, and doesn’t know the nature of the page. is_home will return false. Wrap the code in a function and have it triggered by the wp hook, which comes after the global query object has been hydrated with … Read more

Is it possible to disable a function of a parent theme?

Only under some circumstances. If the parent theme’s functions are wrapped in function_exists conditionals then you should be able to replace them. For example: // Parent if (!function_exists(‘p_wpse_95799’)) { function p_wpse_95799() { // } } If the child theme defines a function named p_wpse_95799 then the parent function will not be used. If this is … Read more

bloginfo() vs get_option?

The two functions output exactly the same thing. From the Codex entry for get_bloginfo(): ‘name’ – Returns the “Site Title” set in Settings > General. This data is retrieved from the “blogname” record in the wp_options table. From source: case ‘name’: default: $output = get_option(‘blogname’); Neither get_bloginfo() nor bloginfo() do any sort of sanitization or … Read more

How to use get_template_directory_uri() to load an image that is in a sub-folder of my theme?

You should echo it and also you are closing your php tag improperly. View source the o/p generated to get some idea img<src=<?php echo get_template_directory_uri().”/assets/img/flexslider/flex-1.jpg”?> alt=”alternative_name”> or you can use bloginfo which is easier to remember and use (You need not echo) <img src=”<?php bloginfo(‘template_url’); ?>/assets/img/flexslider/flex-1.jpg”/>

Check if the user has explicitly set an excerpt

Try this: if ( has_excerpt( $some_post_id ) ) { // Do something here? } else { // Or here? } References: has_excerpt

Delete expired posts after a number of days after they expired

WP Cron jobs are not reliable as it needs someone to visit the site at the time the event should fire. If you need precise timing, you should use server cron jobs. Anyways, lets look at your code and what is wrong and we can fix it wp is a better hook to use to … Read more

Show modified time if post is actually modified

Loosely what you have should work already. However few things are off. Calling these function without time format will produce values like 1:36 pm (depending on your site’s settings), which are not exactly comparable. Post modified time can be less than published in some cases, like scheduled posts. So I would write it along the … Read more

How to add attributes to a shortcode

You just have to add another element to the array (and then output it): function btn_shortcode( $atts, $content = null ) { $a = shortcode_atts( array( ‘class’ => ‘button’, ‘href’ => ‘#’ ), $atts ); return ‘<a class=”‘ . esc_attr($a[‘class’]) . ‘” href=”‘ . esc_attr($a[‘href’]) . ‘”>’ . $content . ‘</a>’; } add_shortcode( ‘button’, ‘btn_shortcode’ … Read more

Shortcode producing headers already sent error

The adjustment to my function below fixed the issue but I wanted to make sure that this is the right way to handle the shortcode. I’ve added ob_start(); and ob_get_clean(); to the function. Is this the correct way to handle something like this? function site_map2( $atts ) { $atts = shortcode_atts( array( ‘exclude’ => ”, … Read more

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